From: "Paul E. McKenney" <paulmck@kernel.org>
To: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: elver@google.com, akpm@linux-foundation.org, tglx@linutronix.de,
peterz@infradead.org, dianders@chromium.org, pmladek@suse.com,
torvalds@linux-foundation.org, Arnd Bergmann <arnd@arndb.de>,
Al Viro <viro@zeniv.linux.org.uk>,
"Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH cmpxchg 03/14] sparc32: unify __cmpxchg_u{32,64}
Date: Mon, 8 Apr 2024 10:49:33 -0700 [thread overview]
Message-ID: <20240408174944.907695-3-paulmck@kernel.org> (raw)
In-Reply-To: <7b3646e0-667c-48e2-8f09-e493c43c30cb@paulmck-laptop>
From: Al Viro <viro@zeniv.linux.org.uk>
Add a macro that expands to one of those when given u32 or u64
as an argument - atomic32.c has a lot of similar stuff already.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
arch/sparc/lib/atomic32.c | 41 +++++++++++++++------------------------
1 file changed, 16 insertions(+), 25 deletions(-)
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c
index e15affbbb5238..0d215a772428e 100644
--- a/arch/sparc/lib/atomic32.c
+++ b/arch/sparc/lib/atomic32.c
@@ -159,32 +159,23 @@ unsigned long sp32___change_bit(unsigned long *addr, unsigned long mask)
}
EXPORT_SYMBOL(sp32___change_bit);
-u32 __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new)
-{
- unsigned long flags;
- u32 prev;
-
- spin_lock_irqsave(ATOMIC_HASH(ptr), flags);
- if ((prev = *ptr) == old)
- *ptr = new;
- spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);
-
- return prev;
-}
+#define CMPXCHG(T) \
+ T __cmpxchg_##T(volatile T *ptr, T old, T new) \
+ { \
+ unsigned long flags; \
+ T prev; \
+ \
+ spin_lock_irqsave(ATOMIC_HASH(ptr), flags); \
+ if ((prev = *ptr) == old) \
+ *ptr = new; \
+ spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);\
+ \
+ return prev; \
+ }
+
+CMPXCHG(u32)
+CMPXCHG(u64)
EXPORT_SYMBOL(__cmpxchg_u32);
-
-u64 __cmpxchg_u64(volatile u64 *ptr, u64 old, u64 new)
-{
- unsigned long flags;
- u64 prev;
-
- spin_lock_irqsave(ATOMIC_HASH(ptr), flags);
- if ((prev = *ptr) == old)
- *ptr = new;
- spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);
-
- return prev;
-}
EXPORT_SYMBOL(__cmpxchg_u64);
unsigned long __xchg_u32(volatile u32 *ptr, u32 new)
--
2.40.1
next prev parent reply other threads:[~2024-04-08 17:49 UTC|newest]
Thread overview: 122+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-01 21:39 [PATCH RFC cmpxchg 0/8] Provide emulation for one- and two-byte cmpxchg() Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 1/8] lib: Add one-byte and two-byte cmpxchg() emulation functions Paul E. McKenney
2024-04-02 13:07 ` Marco Elver
2024-04-02 17:15 ` Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 2/8] sparc: Emulate one-byte and two-byte cmpxchg Paul E. McKenney
2024-04-01 22:38 ` Al Viro
2024-04-01 23:58 ` Paul E. McKenney
2024-04-02 0:07 ` Al Viro
2024-04-02 3:37 ` Al Viro
2024-04-02 4:11 ` Al Viro
2024-04-02 4:18 ` Paul E. McKenney
2024-04-02 4:28 ` [PATCH 1/8] sparc32: make __cmpxchg_u32() return u32 Al Viro
2024-04-02 4:28 ` [PATCH 2/8] sparc32: make the first argument of __cmpxchg_u64() volatile u64 * Al Viro
2024-04-02 4:28 ` [PATCH 3/8] sparc32: unify __cmpxchg_u{32,64} Al Viro
2024-04-02 7:28 ` Arnd Bergmann
2024-04-02 20:02 ` Paul E. McKenney
2024-04-02 4:28 ` [PATCH 4/8] sparc32: add __cmpxchg_u{8,16}() and teach __cmpxchg() to handle those sizes Al Viro
2024-04-02 4:28 ` [PATCH 5/8] parisc: __cmpxchg_u32(): lift conversion into the callers Al Viro
2024-04-02 4:28 ` [PATCH 6/8] parisc: unify implementations of __cmpxchg_u{8,32,64} Al Viro
2024-04-02 4:28 ` [PATCH 7/8] parisc: add missing export of __cmpxchg_u8() Al Viro
2024-04-02 4:28 ` [PATCH 8/8] parisc: add u16 support to cmpxchg() Al Viro
2024-04-02 20:03 ` [PATCH 1/8] sparc32: make __cmpxchg_u32() return u32 Paul E. McKenney
2024-04-03 22:20 ` Al Viro
2024-04-04 3:09 ` Paul E. McKenney
2024-04-02 4:17 ` [PATCH RFC cmpxchg 2/8] sparc: Emulate one-byte and two-byte cmpxchg Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 3/8] ARC: " Paul E. McKenney
2024-04-02 8:14 ` Arnd Bergmann
2024-04-02 17:06 ` Paul E. McKenney
2024-04-02 20:52 ` Paul E. McKenney
2024-04-04 11:57 ` Arnd Bergmann
2024-04-04 14:44 ` Paul E. McKenney
2024-04-04 15:06 ` Arnd Bergmann
2024-04-01 21:39 ` [PATCH RFC cmpxchg 4/8] csky: " Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 5/8] sh: " Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 6/8] xtensa: " Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 7/8] parisc: Emulate " Paul E. McKenney
2024-04-01 21:39 ` [PATCH RFC cmpxchg 8/8] riscv: Emulate one-byte and " Paul E. McKenney
2024-04-04 14:15 ` Palmer Dabbelt
2024-04-04 14:50 ` Paul E. McKenney
2024-05-11 6:50 ` Guo Ren
2024-05-11 14:54 ` Paul E. McKenney
2024-05-11 20:44 ` Leonardo Bras
2024-04-08 17:47 ` [PATCH RFC cmpxchg 0/8] Provide emulation for one- and two-byte cmpxchg() Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 01/14] sparc32: make __cmpxchg_u32() return u32 Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 02/14] sparc32: make the first argument of __cmpxchg_u64() volatile u64 * Paul E. McKenney
2024-04-08 17:49 ` Paul E. McKenney [this message]
2024-04-08 17:49 ` [PATCH cmpxchg 04/14] sparc32: add __cmpxchg_u{8,16}() and teach __cmpxchg() to handle those sizes Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 05/14] parisc: __cmpxchg_u32(): lift conversion into the callers Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 06/14] parisc: unify implementations of __cmpxchg_u{8,32,64} Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 07/14] parisc: add missing export of __cmpxchg_u8() Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 08/14] parisc: add u16 support to cmpxchg() Paul E. McKenney
2024-04-08 20:10 ` Linus Torvalds
2024-04-08 20:53 ` Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 09/14] lib: Add one-byte emulation function Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 10/14] ARC: Emulate one-byte cmpxchg Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 11/14] csky: " Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 12/14] sh: " Paul E. McKenney
2024-04-18 8:04 ` Geert Uytterhoeven
2024-04-08 17:49 ` [PATCH cmpxchg 13/14] xtensa: " Paul E. McKenney
2024-04-18 8:06 ` Geert Uytterhoeven
2024-04-18 23:21 ` Paul E. McKenney
2024-04-19 5:07 ` Yujie Liu
2024-04-19 8:02 ` Geert Uytterhoeven
2024-04-20 14:03 ` Paul E. McKenney
2024-04-08 17:49 ` [PATCH cmpxchg 14/14] riscv: " Paul E. McKenney
2024-04-09 17:35 ` Andrea Parri
2024-04-09 18:08 ` Paul E. McKenney
2024-05-01 22:58 ` [PATCH v2 cmpxchg 0/8] Provide emulation for one--byte cmpxchg() Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 01/13] sparc32: make __cmpxchg_u32() return u32 Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 02/13] sparc32: make the first argument of __cmpxchg_u64() volatile u64 * Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 03/13] sparc32: unify __cmpxchg_u{32,64} Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 04/13] sparc32: add __cmpxchg_u{8,16}() and teach __cmpxchg() to handle those sizes Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 05/13] parisc: __cmpxchg_u32(): lift conversion into the callers Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 06/13] parisc: unify implementations of __cmpxchg_u{8,32,64} Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 07/13] parisc: add missing export of __cmpxchg_u8() Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 08/13] parisc: add u16 support to cmpxchg() Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 09/13] lib: Add one-byte emulation function Paul E. McKenney
2024-05-13 14:44 ` Boqun Feng
2024-05-13 15:41 ` Paul E. McKenney
2024-05-13 15:57 ` Boqun Feng
2024-05-13 21:19 ` Boqun Feng
2024-05-14 14:22 ` Paul E. McKenney
2024-05-14 14:53 ` Boqun Feng
2024-05-14 15:02 ` Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 10/13] ARC: Emulate one-byte cmpxchg Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 11/13] csky: " Paul E. McKenney
2024-05-11 6:42 ` Guo Ren
2024-05-11 14:49 ` Paul E. McKenney
2024-05-01 23:01 ` [PATCH v2 cmpxchg 12/13] sh: " Paul E. McKenney
2024-05-02 4:52 ` John Paul Adrian Glaubitz
2024-05-02 5:06 ` Paul E. McKenney
2024-05-02 5:11 ` John Paul Adrian Glaubitz
2024-05-02 13:33 ` Paul E. McKenney
2024-05-02 20:53 ` Al Viro
2024-05-02 21:01 ` alpha cmpxchg.h (was Re: [PATCH v2 cmpxchg 12/13] sh: Emulate one-byte cmpxchg) Al Viro
2024-05-02 22:16 ` Linus Torvalds
2024-05-02 21:18 ` [PATCH v2 cmpxchg 12/13] sh: Emulate one-byte cmpxchg Paul E. McKenney
2024-05-02 22:07 ` Al Viro
2024-05-02 23:12 ` Paul E. McKenney
2024-05-02 23:24 ` Al Viro
2024-05-02 23:45 ` Paul E. McKenney
2024-05-02 23:32 ` Linus Torvalds
2024-05-03 0:16 ` Paul E. McKenney
2024-05-02 21:50 ` Arnd Bergmann
2024-05-02 5:42 ` D. Jeff Dionne
2024-05-02 11:30 ` Arnd Bergmann
2024-05-01 23:01 ` [PATCH v2 cmpxchg 13/13] xtensa: " Paul E. McKenney
2024-05-02 20:01 ` [PATCH v2 cmpxchg 0/8] Provide emulation for one--byte cmpxchg() Al Viro
2024-05-02 21:20 ` Paul E. McKenney
2024-06-04 17:02 ` [PATCH v3 cmpxchg 0/4] " Paul E. McKenney
2024-06-04 17:04 ` [PATCH v3 cmpxchg 1/4] ARC: Emulate one-byte cmpxchg Paul E. McKenney
2024-06-04 17:04 ` [PATCH v3 cmpxchg 2/4] sh: " Paul E. McKenney
2024-06-04 17:09 ` John Paul Adrian Glaubitz
2024-06-04 17:50 ` Paul E. McKenney
2024-06-04 17:56 ` John Paul Adrian Glaubitz
2024-06-04 21:14 ` Paul E. McKenney
2024-06-04 17:04 ` [PATCH v3 cmpxchg 3/4] xtensa: " Paul E. McKenney
2024-06-04 17:04 ` [PATCH v3 cmpxchg 4/4] ARM: " Paul E. McKenney
2024-06-04 20:52 ` Linus Walleij
2024-06-04 21:14 ` Paul E. McKenney
2024-06-05 8:38 ` Linus Walleij
2024-06-05 18:05 ` Paul E. McKenney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20240408174944.907695-3-paulmck@kernel.org \
--to=paulmck@kernel.org \
--cc=akpm@linux-foundation.org \
--cc=arnd@arndb.de \
--cc=dianders@chromium.org \
--cc=elver@google.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=pmladek@suse.com \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
--cc=viro@zeniv.linux.org.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).